R38 Thread button bits

Thread button drill bits are made by high quality alloy steel bar and tungsten carbides. Through heat treatment, our drilling tools are tough enough to meet rock drilling demands and have the least loss of energy while drilling the rocks. Besides, we can design customized thread button drill bits according to different drilling appliion, and custom drill bits are applicable to drill soft rock,

70mm Drill Bit, 70mm Drill Bit Suppliers and Manufacturers

Alibaba offers 1,505 70mm drill bit products. About 52% of these are drill bit, 17% are mining machinery parts, and 1% are construction machinery parts. A wide variety of 70mm drill bit options are available to you, such as twist drill bit, core drill bit, and center drill bit.